# 2025.06.17 Weekly Meeting

**URL:** <https://discourse.slicer.org/t/2025-06-17-weekly-meeting/43388>\
**Category:** Weekly meetings\
**Created:** [June 17, 2025, 2:09pm UTC](https://discourse.slicer.org/t/2025-06-17-weekly-meeting/43388 "2025-06-17T14:09:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Sam\_Horvath](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sam_horvath/32/3092_2.png) [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Post date:** [June 17, 2025, 2:09pm UTC](https://discourse.slicer.org/t/2025-06-17-weekly-meeting/43388/1 "2025-06-17T14:09:35Z")

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Today, we will be having our next weekly hangout at **11:00 AM ET until 12:00 PM ET,** after the project week meeting. We will be reusing the Project Week Zoom link.

Anyone is welcome to join at this link: [Launch Meeting - Zoom](https://etsmtl.zoom.us/j/82098172682?pwd=OHXPL5SlaLt817CzeBu8C1Pu21PvqW.1)

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> **Weekly Meeting**
>
> **Starts:** June 17, 2025, 11:00am (America/New\_York)\
> **Link:** <https://etsmtl.zoom.us/j/82098172682?pwd=OHXPL5SlaLt817CzeBu8C1Pu21PvqW.1>

**Agenda:**

Please post to this thread to put a topic on the agenda! We will try to prioritize agenda items during the meeting.

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Thanks  
Sam and J-Christophe

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [June 17, 2025, 2:21pm UTC](https://discourse.slicer.org/t/2025-06-17-weekly-meeting/43388/2 "2025-06-17T14:21:14Z")

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I’d like to discuss some work I’ve been doing on integrating [SimNIBS](https://simnibs.github.io/simnibs/build/html/index.html) in [SlicerTMS](https://github.com/slicertms/SlicerTMS) using [rpyc](https://rpyc.readthedocs.io/en/latest/docs.html) and some of the performance issues I’ve discovered in updating the scalar array.

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [June 18, 2025, 6:51pm UTC](https://discourse.slicer.org/t/2025-06-17-weekly-meeting/43388/3 "2025-06-18T18:51:19Z")

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As a followup, here’s info on the rendering performance issue I mentioned during the meeting. Looks like it will be easy to resolve with a patch to VTK. I’ll test it out and make a an MR to upstream VTK that we may want to merge into Slicer/VTK sooner.

> **[Use of vtkGeometryFilter in vtkDataSetMapper](https://discourse.vtk.org/t/use-of-vtkgeometryfilter-in-vtkdatasetmapper/15740)**
>
> I’m displaying cell data on an unstructured grid and noticed a slowdown in rendering as the field changes (geometry is unchanged). Profiling a bit I noticed most of the time is taken in the vtkDataSetMapper to extract the surface of the...

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**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [July 1, 2025, 2:09pm UTC](https://discourse.slicer.org/t/2025-06-17-weekly-meeting/43388/4 "2025-07-01T14:09:02Z")

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### Meeting Notes

#### Experiment with RPyC for Streaming Scalar Fields

- @pieper explored the use of [RPyC](https://rpyc.readthedocs.io/en/latest/) (Remote Python Call) to stream **scalar fields** associated with **unstructured grids**.

- **What is RPyC?**  
A Python library for **symmetrical remote procedure calls** , **clustering** , and **distributed computing**. It can use **shared memory** for efficient local communication of large arrays between processes.

- **Current Bottleneck** :

- **Next Steps** :

#### SlicerTelemetry

- **Test Server Deployment** :

- **Hosting Plans** :

- **Repository Renaming** :

- **Related Pull Requests** :